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(A) Two-dimensional differential in-gel electrophoresis (2D-DIGE) gels of urinary proteins of a child with obstructive sleep apnea (OSA) and a matched child with primary snoring (PS) and fluorescence image overlay. (B) Candidate spot analysis showing spot location on gel, differential intensity analysis for two spots showing increased expression in OSA (spots 1 and 2), and two spots in which decreased expression occurred (spots 3 and 4).
